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pachastrellosideA particular steroid glycoside.pachydermatoceleOne of the loose, inelastic folds of skin that characterize chalazoderma.paedomorphocline(biology) A sequence of increasingly more paedomorphic speciespalaeoatmosphereAlternative form of paleoatmosphere.palaeoearthquakeAlternative form of paleoearthquake.palaeolacustrineAlternative form of paleolacustrine.paleobioprovinceA prehistoric bioprovincepaleotemperature(geology) The temperature at a location in the geologic pastpalliobranchiate(zoology, archaic) Belonging to the former class Palliobranchiata; having the pallium, or mantle, acting as a gill, as in certain brachiopods.palynoassemblageAn assemblage of spores and pollen etc.pancreatectomize(transitive) To perform a pancreatectomy upon.paniculatumosideA particular steroid glycoside.parabenzoquinone(organic chemistry) One of the two isomers of quinone, 1,4-benzoquinone.paraconglomerate(geology) A conglomerate in which large fragments are separated by abundant fine-grained matrix.paraformaldehyde(organic chemistry) A solid oligomer of formaldehyde that is used as a fumigant, and as a fixative in histologyparafransoletite(mineralogy) A triclinic-pinacoidal mineral containing beryllium, calcium, hydrogen, oxygen, and phosphorus.paraguanajuatite(mineralogy) A trigonal-hexagonal scalenohedral mineral containing bismuth, selenium, and sulfur.paramagneticlike(physics) Having some characteristics of a paramagnetic materialparaschachnerite(mineralogy) An orthorhombic-dipyramidal tin white mineral containing mercury and silver.parencephaloceleThe protrusion of the cerebellum through a defect in the cranium.paucituberculateRelating to the Paucituberculatapedunculopontine(anatomy) Relating to the peduncle and pons of the brainpelargonaldehyde(organic chemistry) Synonym of nonanal.pentacarboxylate(organic chemistry) Any compound containing five carboxylate groups or anionspentadecahydrate(chemistry) A hydrate containing fifteen molecules of water per molecule or unit cell.pentadecapeptideAn oligopeptide composed on fifteen amino acid residuespentahydroborite(mineralogy) A basic calcium borate found in skarn mineralspentalenolactone(organic chemistry) A sesquiterpene lactone, isolated from some Streptomyces species, that shows antibiotic activitypentamillionaireA person whose wealth amounts to five million dollars (or other currency unit).pentatriacontane(organic chemistry) Any of very many isomers of the aliphatic hydrocarbon having thirty-five carbon atoms, but especially n-pentatriacontane CH₃(CH₂)₃₃CH₃peptidylarginineAn arginine residue within a peptideperchlorobenzene(organic chemistry) hexachlorobenzeneperchloromethane(organic chemistry) Carbon tetrachloride.perfluoroheptane(organic chemistry) Any perfluoro derivative of a heptane, but especially n-perfluoroheptaneperfluoropentane(organic chemistry) Any perfluoro derivative of a pentane, but especially n-perfluoropentaneperfluoropropane(organic chemistry) The fluorocarbon C₃F₈perhydrosqualene(organic chemistry) The fully saturated triterpene derived from squaleneperilabyrinthineSurrounding a labyrinth (of the ear)perissodactylate(zoology) Of or relating to the Perissodactyla.peroxidisulphateperoxidisulfateperoxodisulphateAlternative form of peroxidisulfate.persulphocyanate(obsolete, chemistry) A salt of persulphocyanic acid.phalacrocoracine(zoology) Relating to the Phalacrocoracidae.pharmacogenotypeA genotype that has an influence on the response to a drugpharmacoinvasive(medicine) invasive by a pharmaceutical medicationpharmacopuncture(medicine) Acupuncture as a means of delivering pharmaceuticals.pharmacoresponse(medicine) Response to pharmacotherapy.pharmacosiderite(mineralogy) A hydrated basic ferric arsenate, consisting of the elements arsenic, iron, hydrogen, potassium, sodium and oxygen.pharyngopalatine(anatomy) Synonym of palatopharyngeal.phenanthrenylene(organic chemistry) Any arylene derived from phenanthrenephenanthridinone(organic chemistry) A cyclic amide derived from phenanthridine that has immunosuppressant activityphenisobromolateSynonym of bromopropylate.phenophosphazine(organic chemistry) Alternative form of phenophosphazinine.phenoxaphosphine(organic chemistry) Alternative form of phenoxaphosphinine.phenoxybenzamine(pharmacology) A drug that blocks the activity of alpha-receptors and is used in the form of its hydrochloride C₁₈H₂₂ClNO·HCl especially to treat hypertension and sweating due to pheochromocytoma.phenoxypropazineA hydrazine derivative and monoamine oxidase inhibitor.phenpromethamineA phenethylamine stimulant drug.phenylalkylamine(organic chemistry) Any phenyl derivative of an alkylaminephenylenediamine(organic chemistry) Any of the three isomeric di-amino-benzenes, used as intermediates in the manufacture of pharmaceuticals, plastics etc.phenylethylamide(organic chemistry) N-phenylethyl-azanidephenylethylamineAlternative form of phenethylamine.phenylpiperazine(chemistry) A chemical compound featuring a phenyl group bound to a piperazine ring, many of whose derivatives are used as pharmaceuticals.phenylpiperidine(chemistry) A chemical compound with a phenyl moiety directly attached to piperidine.phenylpropionate(chemistry) Any salt or ester of phenylpropionic acid.phenyltoloxamineA particular antihistamine drug with sedative and analgesic effects.philoprogenitiveProlific, or producing many offspring.phosphanthridine(organic chemistry) A heterocycle formally derived from phenanthridine by replacing the nitrogen atom with phosphorusphosphindolizine(organic chemistry) A heterocycle formally derived from indolizine by replacing the nitrogen atom with phosphorusphosphoadenosine(organic chemistry) Adenosine phosphate, (especially adenosine monophosphate).phosphoanhydride(inorganic chemistry) The anhydride of a phosphoric acid or, especially, of a polyphosphoric acidphosphoaspartate(biochemistry) A phosphorylated form of aspartate, typically formed via protein phosphorylationphosphocaseinateA complex of calcium phosphate and casein manufactured from skimmed milkphosphocelluloseA phosphorylated cellulose used as an ion exchange resin.phosphodefective(biochemistry) That has defective phosphorylationphosphoglucerateMisspelling of phosphoglycerate.phosphogluconate(organic chemistry) Any phosphate derivative of a gluconate.phosphoglucoside(organic chemistry) A form of glucoside derived from phosphoglucosephosphoglycerate(organic chemistry) glycerophosphatephosphoglyceride(organic chemistry) a phosphatide combined with a small, basic molecule (such as choline or ethanolamine); a phospholipidphosphoglycolate(biochemistry) The anion PO₃-O-CH₂CO₂³⁻ that inhibits photosynthesis.phosphohistidine(organic chemistry) Either of two N-phosphate derivatives of histidine (in which N-H is replaced by N-PO₃H)phosphohydrolase(biochemistry) Any enzyme that hydrolyzes an organic phosphate groupphosphoinositide(organic chemistry) The inositol ester of phosphoric acid that is a component of phosphatidylinositolsphosphoisomerase(biochemistry) Any enzyme that catalyses the isomerization of carbohydrate phosphatesphosphomolybdate(inorganic chemistry) Any salt of phosphomolybdic acidphosphonoacetate(chemistry) A salt or ester of phosphonoacetic acid.phosphonoformate(organic chemistry) Any salt of phosphonoformic acidphosphonothioate(organic chemistry) Any anion of the form R-O-PH(=O)-S⁻ (or similar forms having the negative charge on the oxygen atom)phosphopeptidome(biochemistry) A peptidome of phosphopeptidesphosphorothioate(biochemistry) A derivative of phosphate in which an oxygen atom is replaced with sulfur; especially such a variant of nucleic acidphosphorylatable(biochemistry) Capable of being phosphorylatedphosphoselective(immunology, of an antibody) That only reacts with a phosphorylated materialphosphosensitive(biochemistry) sensitive to phosphate concentrationphosphosubstrate(biochemistry) Any (immunological) substrate containing phosphatephosphothreonine(organic chemistry) The phosphorylated form of threonine.phosphotungstate(organic chemistry, inorganic chemistry) A salt or ester of phosphotungstic acid.photoacclimativeRelating to, or producing photoacclimationphotoactivatableThat is able to be activated by lightphotoactivatibleMisspelling of photoactivatable.photoassociativeOf, pertaining to, or resulting from photoassociationphotocapacitanceThe change in capacitance caused by light absorption.photochromoscopeA device for giving shifting effects of color to a photograph. The unmounted print, made translucent, is illuminated from behind with colored light.photocoagulativeRelating to, or causing photocoagulationphotoconductance(physics) The conductance of a material as a result of photoconductivityphotoconsumptiveRelating to photoconsumptionphotoconvertableMisspelling of photoconvertible.photoconvertibleThat may be converted (from one form to another) by the action of lightphotodegradativeCausing or relating to photodegradation.photodissociableCapable of undergoing photodissociation.photoelectrotype(dated, photography) An electrotype plate formed in a mould made by photographing on prepared gelatine, etc.photoencapsulateTo encapsulate photochemicallyphotoentrainableentrainable by means of lightphotoequivalencePhotochemical equivalence, as described by the Stark-Einstein law.photoevaporativeThat causes photoevaporationphotogastroscopeA device used to take photographs of the interior of the stomach.photoinsecticideAn insecticide whose efficacy is improved with a photosensitizing agentphotoinsensitiveNot easily affected by lights.photopatternableSuitable for photopatterning.photoprecipitateTo cause, or to undergo photoprecipitationphotoreflectance(physics) reflectance that varies according to the incident light levelphotoretinoscopeSynonym of retinoscope, but especially one that uses a particular form of light (such as infrared)phototransferase(biochemistry) Any photochemical transferasephototriggerablephotochemically triggerablephragmobasidiate(mycology) Being or containing a phragmobasidium.phthalocyaninate(organic chemistry) A complex of a phthalocyanine with a metal ion.phylomorphospace(biology) A graphical representation of the morphology of a group of related speciesphytoassimilableThat can assimilate in a plantphytoequivalence(pharmacology, herbal medicine) A physiological equivalence between the effects of two herbal extracts, the efficacy of one of which has been clinically demonstrated.phytoremediativeRelating to phytoremediation.phytosiderophore(biochemistry) Any of a class of chelate compounds, common in grasses, that sequester iron.phytosphingosine(organic chemistry) dihydrosphingosine (and related compounds)picoprasinophyteAny green alga of the class Picoprasinophyceae, of which Picocystis salinarum is the sole accepted species in 2019.pithecanthropineBelonging to the former hominid genus Pithecanthropus.plakohypaphorine(organic chemistry) Any of a group of iodine-containing indole alkaloids resembling hypaphorine and first reported in the Caribbean sponge Plakortis simplex.plantarenaloside(organic chemistry) An iridoid found in the genus Psyllium.pleuropneumoniaeAlternative form of pleuropneumonia.plioplatecarpineAny squamate mosasaur of the subfamily Plioplatecarpinaeplumbopyrochlore(mineralogy) An isometric-hexoctahedral mineral containing calcium, hydrogen, iron, lead, niobium, oxygen, silicon, tantalum, uranium, and yttrium.plumodenticulateplumose and denticulatepneumoprotective(pharmacology) That serves to protect the lungs.polyagglutinableAble to undergo polyagglutinationpolycaprolactone(chemistry) A biodegradable polyester used in medical applications such as suturespolycarbohydrateSynonym of polysaccharide.polychalcogenide(chemistry) Any compound of general formula REₙR having a chain of more than two chalcogen atoms.polydepsipeptide(biochemistry) A polymeric depsipeptidepolyethersulfone(chemistry) Any of a family of thermoplastic polymers that are known for their toughness and stability at high temperatures. They contain the subunit aryl-SO₂-aryl, the defining feature of which is the sulfone group.polyethylenimineMisspelling of polyethyleneimine.polyextremophile(biology) An organism which can tolerate two or more extreme environmental factors.polyformaldehyde(chemistry) polyoxymethylenepolyisobutadieneSynonym of polyisoprene (especially in the rubber industry)polyisocyanurate(organic chemistry) A form of polyurethane polymer, based on cyanuric acid, formed from a polyhydroxy alcohol and a diisocyanate; it forms foams that are used for thermal insulationpolymalformative(medicine) Having or characterised by multiple congenital malformations.polymethacrylate(chemistry) Any salt or ester of polymethacrylic acidpolynucleotidase(biochemistry) Any of several enzymes which catalyze the hydrolysis of polynucleotides to form oligonucleotides and eventually simple nucleotides.polyoxometallateAlternative form of polyoxometalate.polyoxomolybdate(inorganic chemistry) Any of several complex, polymeric anions composed of molybdate and oxyanion speciespolyoxopalladate(inorganic chemistry) A polyoxometalate with palladium as the metal.polyoxotungstate(inorganic chemistry) A complex oxyanion of tungsten that is used in protein crystallisationpolyoxymethylene(chemistry) A polymer of formaldehyde having a repeat unit of -CH₂-O- ; it is used in engineering to make small gears etcpolysaccharidase(biochemistry) Any enzyme that catalyses the hydrolysis of a polysaccharidepolyubiquitinate(biochemistry) To cause or to undergo polyubiquitination.polyubiquitylatepolyubiquitinateporphyrogeniturethe principle of royal succession in which the first son born after his father's accession to the throne has the first claim, even if he has older brothers who were born before the father's crowning.postadjudicativeSynonym of postadjudication.postarsphenamineAfter arsphenamine has been administered.postextrasystoleThe part of an irregular heartbeat rhythm following an extrasystolepostindependenceOccurring after a country has achieved independencepostremogenitureInheritance by the last-born child of the entirety of, or of a privileged position in, a parent’s wealth, estate, or office; ultimogeniture.postreproductiveFollowing a productive stage.potassicleakeite(mineralogy) A monoclinic-prismatic reddish brown mineral containing hydrogen, iron, lithium, magnesium, manganese, oxygen, potassium, silicon, sodium, and vanadium.preautophagosomeA precursor in the formation of an autophagosomeprecontemplativeBefore contemplation.predeterminativeOf or relating to predetermination.pregnanetriolone(biochemistry) The corticosteroid hormone (3R,5R,8S,9S,10S,13S,14S,17R)-3,17-dihydroxy-17-[(1S)-1-hydroxyethyl]-10,13-dimethyl-2,3,4,5,6,7,8,9,12,14,15,16-dodecahydro-1H-cyclopenta[a]phenanthren-11-onepreinvestigativePrior to investigation.premnaspirodiene(organic chemistry) The vetispirane (2R,5S,10R)-6,10-dimethyl-2-(prop-1-en-2-yl)spiro[4.5]dec-6-enepreobrazhenskite(mineralogy) An orthorhombic-dipyramidal mineral containing boron, hydrogen, magnesium, and oxygen.prephosphorylateTo cause or to undergo prephosphorylation.preproliferativePrior to proliferationprequestionnaireA questionnaire completed before a task or exercise.prochlorperazine(pharmacology) A drug C₂₀H₂₄ClN₃S (trademark Compazine) that is a phenothiazine derivative having antiemetic and antipsychotic properties.promegakaryocyte(biochemistry) A precursor cell for a megakaryocyte, arising from a megakaryoblast.propanedinitrileMalononitrile.propargylglycine(organic chemistry) The 2-propargyl derivative of glycine; any of its derivatives, some of which are enzyme inhibitorsprophenoloxidaseAn inactive precursor of phenoloxidasepropositionalizeTo convert by means of propositionalizationproprioreceptiveMisspelling of proprioceptive.proproliferativeThat leads to proliferationpropylacrylamide(organic chemistry) The N-propyl derivative of acrylamide that is a monomer used in the production of polyacrylamidesprothrombokinaseSynonym of proconvertin.protocooperativeRelated to, or characterized by protocooperationpseudocapacitiveOf the nature of a pseudocapacitor.pseudocharitableApparently, but not actually, charitable.pseudochromosomeA pseudomolecule representing a chromosome.pseudocollarable(mathematics) Such that there exists a neighborhood that is homeomorphic to a product, but this homeomorphism may not preserve all the desired structures or conditions that a true collar neighborhood would.pseudocollegiateApparently, but not actually, collegiate.pseudocongruenceApparent congruencepseudoconscienceA mindset or mental faculty that is mistaken for a conscience but lacks the truly ethical nature thereof.pseudocyphellate(biology, of some lichens) Having pseudocyphellaepseudodisciplineAn area of study that has a limited resemblance to an academic discipline.pseudoexperienceA simulated or inauthentic experience.pseudopalindromeA word or sequence of words that almost reads the same forwards and backwards.pseudoparasitiseTo infest with pseudoparasitespseudoparasitizeAlternative form of pseudoparasitise.pseudoperoxidaseAny nonenzymatic material or process that has peroxidase activitypseudorepetitiveApparently or approximately repetitivepseudoreticulateHaving a false reticulum, usually formed by anastomising ridges.pseudoreversible(chemistry) Describing a reaction (especially a redox reaction) in which the products of the reverse reaction are not identical with the starting materialspseudosaccharide(organic chemistry) Any of several heterocyclic compounds that have a five-membered ring with two oxygen atoms in positions 1- and 3-.pseudozygospheneA rudimentary zygosphene present in early reptilespsychiatristlikeResembling a psychiatrist.psychologistlikeResembling a psychologist.psychrosensitive(sciences) Sensitive to the cold.psychrotolerancetolerance of the coldpurpureagitosideA particular steroid glycoside.pyrazoloanthrone(organic chemistry) A tetracyclic heterocyclic ketone composed of a pyrazole ring fused to an anthronepyrazolopyridineAny of a class of anxiolytic drugs that act as positive allosteric modulators of the GABA_A receptor at the barbiturate binding site.pyridopyrimidine(organic chemistry) Any of a class of bicyclic heterocycles consisting of a pyridine fused to one of pyrimidinepyrimidinetrione(organic chemistry) Any derivative of pyrimidine that has three carbonyl groups in the ring; many are barbituratespyroluminescenceluminescence produced by high temperature (typically, in a flame)pyropheophorbideAny of a group of breakdown products of pheophorbides that retain a porphyrin ring systempyrrolidinedione(organic chemistry) A derivative of pyrrolidine having two carbonyl groupspyrrolocarbazole(organic chemistry) Any of several isomeric tetracyclic heterocycles composed of a pyrrole ring fused to a carbazole moietypyrroloquinoline(organic chemistry) Any of a family of compounds containing a pyrrole ring fused to the benzene ring of a quinoline